Johnson & Johnson is expanding operations in Puerto Rico. The company and the governor of the U.S. island territory jointly announced an expansion of four existing plants that will add 308 jobs. A Johnson & Johnson spokesman said the company based in New Brunswick, New Jersey would invest up to $225 million to add capacity at two plants in the town of Gurabo and one each in Manati and San Lorenzo. Spokesman Stephen Dnistrian said three plants are part of its Janssen pharmaceutical division. The other is part of the medical device division.